Quick update: 4/6 are males., so the seed inspection method is not 100%.
My F & D continues to blow away my hpa to the point I think something is wrong in there. I'm guessing it's coverage, so I went from 2 dual head misters to 3 single heads. It may be too late to make any huge improvements to the plants themselves, but it will be interesting to see whether this makes a discernible difference: it should.
FYI, all the holes are taped from the outside.
Here's a pic of the heads, which are now aiming ~ 25^s up, which should help swirl nutes around the pod.